Spring guns are often the least expensive, and in some cases the most reliable. A quality spring airsof gun will practically last forever if you don't abuse it. This is because there are few moving parts within the gun and there is not much which can go wrong. The drawback of spring guns is that they need to be manually cocked before each shot is fired. This makes them good starter guns, but if playing against someone with an automatic AEG then you will have a big disadvantage because they will be able to pump out bbs 100 times faster than you. In serious airsoft battles the only time you really see spring guns used is for sniping. Snipers do not rely on a high rate of fire but instead use tactics, cover, concealment, and marksmanship to take down their prey.
